1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb03239e0ef211f125b18e5a5bbe60618ad52380bf7281c685af9d5f5129ee. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9026682e-7606-4d30-abbd-a4370cdbf7e0.json and https://artists.proofprofile.net/proofs/artist/9026682e-7606-4d30-abbd-a4370cdbf7e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4428300171ad038b9df93347c141854d0c30ee7ed68d1c2e711328e75ee8825. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f5d515137152ee3dbcae6f2a2a4b9d286e7a4936ea854620fc2dad6d76429. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30001202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c934492fd7a87e6233c220f948f06e0f4f071aeaa1043e8b41e07e777a70ff0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30001131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2581b19ebbfbe9ed0d62a3a3071237070c40ad9023461a475245c4417d5babeb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30001132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003ff0aa963a7e4df5d15eddb601bb92913447aa8e44c6ce27ec8226b33d71d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30001133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf77f42f9c1f2f53eb6a449cda3319a06f863d07ac0b0d4b624d8d8012ae757. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30001134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36818fb5c9eaf9929a2a69d16b9d5d1892fbca909618ca4414625559b23af02b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30001135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d15e90cce5e3208501d13ffc6a828b4a3f55dc43d645c67f61cf602b011b643. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EEKN30001137.